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(CBS) Major League Baseball is looking into a domestic violence accusation against Cubs shortstop Addison Russell, sources confirmed.

The league is looking into the matter but stopped short of calling it a formal investigation, sources told CBS 2’s Sandra Torres and 670 The Score’s Bruce Levine.

Russell’s wife, Melisa, published an Instagram post Wednesday evening while the Cubs-Marlins game was being played that said the 23-year-old Russell had cheated on her and that indicated the two were breaking up. They were married in 2016. The post has since been deleted.

In a comment that came after the original post, an individual who identified herself as Melisa’s friend told another Instagram user that Russell had hit his wife before.